Hyundai Elantra Owners Manual
Hyundai Elantra: Windshield defrosting and defogging
Your Hyundai Elantra’s catalytic converter is critical for reducing exhaust emissions. This section explains how it works and how to avoid damaging it.
WARNING
Do not use the 
or
position during cooling operation in
position and fan speed control
- For maximum defrosting, set the temperature control to the extreme right/hot position and the fan speed control to the highest speed.
- If warm air to the floor is desired while defrosting or defogging, set the mode to the floor-defrost position.
- Before driving, clear all snow and ice from the windshield, rear window, outside rear view mirrors, and all side windows.
- Clear all snow and ice from the hood and air inlet in the cowl grill to improve heater and defroster efficiency and to reduce the probability of fogging up the inside of the windshield.
✽ NOTE
Be sure to keep the interior surface of the windshield clean by wiping it with a clean cloth and glass cleaner. This will help reduce the tendency of the glass fogging and also improve visibility.
Manual climate control system
To defog inside windshield
1. Select any fan speed except “0” position.
2. Select desired temperature.
3. Select the or
position.
4. The outside (fresh) air will be selected automatically.
If the outside (fresh) air position is not selected automatically, press the corresponding button manually.
To defrost outside windshield
1. Set the fan speed to the highest (extreme right) position.
2. Set the temperature to the extreme hot position.
3. Select the position.
4. The outside (fresh) air will be selected automatically.
Automatic climate control system
To defog inside windshield
1. Select desired fan speed.
2. Select desired temperature.
3. Press the defrost button ().
4. The outside (fresh) air position will be selected automatically.
If the outside (fresh) air position is not selected automatically, adjust the corresponding button manually.
If the position is selected, lower
To defrost outside windshield
1. Set the fan speed to the highest (extreme right) position.
2. Set the temperature to the extreme hot (HI) position.
3. Press the defrost button ().
4. The outside (fresh) air position will be selected automatically.
If the position is selected, lower
Defogging logic
When defogging logic is operating, the air intake is controlled automatically
(You can’t control the air intake) according to certain conditions such as
or
position to reduce the probability
Manual climate control system
1. Turn the ignition switch to the ON position.
2. Press the defrost button ().
3. Push the air intake control button at least 5 times.
The indicator light in the air intake control button will blink 3 times with 0.5 second of interval. It indicates that the defogging logic is canceled or returned to the programmed status.
If the battery has been discharged or disconnected, the system resets to the programmed defogging logic.
Automatic climate control system
1. Turn the ignition switch to the ON position.
2. Select the defrost position pressing defrost button ().
3. While holding the air conditioning button (A/C) pressed, press the air intake control button at least 5 times within 3 seconds.
The indicator on the air intake control button blinks 3 times with 0.5 second of interval. It indicates that the defogging logic is canceled or returned to the programmed status.
If the battery has been discharged or disconnected, the system resets to the programmed defogging logic.
Understanding the operation of your Hyundai Elantra's air conditioning system ensures consistent comfort and efficiency. The A/C system not only cools but also dehumidifies the cabin air, improving clarity and preventing window fogging. By setting the temperature and selecting appropriate vent modes, you gain full control over airflow direction and intensity. Learning to balance fan speed and recirculation modes enhances cooling without wasting fuel. On humid days, activating the compressor early reduces cabin moisture and increases effectiveness. The system is designed to shut off during hard acceleration to prioritize engine performance. Using it in defrost mode speeds up windshield clearing. Monitoring refrigerant levels ensures optimal cooling over time. Regular service helps prevent component wear like clogged condensers or faulty compressors. When used wisely, the air conditioning system boosts both driving comfort and vehicle longevity.
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